As the war between Iran and Israel intensified, teasing the eventual involvement of the US military, American security agencies began to warn of a looming threat of Tehran-backed “sleeper cells” known to be active stateside that could be called in for retaliatory attacks. But as the B-2 bombers struck nuclear sites across Iran and the Iranian military responded with a missile barrage on US bases in the region, a ceasefire took shape. In the end, the Islamic Revolutionary Guard Corps (IRGC) – Iran’s elite military and intelligence branch, wielding a global web of terrorist groups and agents acting on its...